Metallic ceiling



(No Model.)

H. ADLER.

METALLIC GEILING.

No. 460,283. Patented'Sept. 29, 1891.

Mv' mI UNITED STATES PATENT OFFICE.

HENRY ADLER, OF ALLEGHENY, PENNSYLVANIA.

METALLIC CEILING.

SPECIFICATION forming part of Letters Patent No. 460,283, dated September 29, 1891.

Application filed May 4: 1391- Serial No. 391,562. (No model.)

To all whom it may concern:

Be it known that I, HENRY ADLER, of Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and usefulImprovem ent in Metallic Ceilings; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to an improvementin metallic ceilings; and it consists in the combination of two flat sheet-metal plates united by a lap-joint or seam on one side of said sheets and diverging therefrom in right lines to the opposite side of the same in such manner as to form between the sheets an open triangular groove having the seam at its apex, whereby it is hidden from View on the under side or face of said sheets.

To enable others skilled in the art with which my invention is most nearly connected to make and use it, I will proceed to describe its construction.

In the accompanying drawings, which form part of my specification, Figure 1 is a trans verse section of the metallic ceiling secured to the joists. Fig. 2 is an enlarged view of the same, exhibiting the method of securing the joists. Fig. 3 is a plan view of my improvement when the plates or sheets are secured together. Fig. 4: is a plan View of detached sheet. 1

In the construction of my improved metallic ceiling I take a sheet of metal of any desired size and by suitable machinery so bend two of its edges or sides as to form a groove or recess like that shown at A in Figs. 1 and 2, and also form a single flange or tongue on the other two sides or edges, as at B. (Shown in Figs. 1 and Panels of any size recesses can be formed, if desired. Recesses of like shape may be made in the sheet orpanel for the purpose of concealing the joints.

Ceilings constructed upon the plan of my improvement will be free from the unsightly joists common to iron ceilings, and it will be cheap, durable, and ornamental.

Having thus described my improvement, what I claim is In a sheet-metal ceiling, the combination of two fiat sheet-metal plates united by a lap-,

joint or seam on one side of said sheets and diverging therefrom in right lines to the opposite side of the same in such manner as to form between the sheets an open triangular groove having the seam at its apex, whereby it is hidden from View on the under side or face of said sheets, as herein described and shown.

In testimony whereof I have hereunto set my hand this 1st day of May, A. D. 1891.

HENRY ADLER. Witnesses:

A. C. JOHNSTON, I. C. JOHNSTON. 

